Biology, asked by gunal6565, 1 year ago

prove that tan 70°= 2tan50° plus tan 20° h

Answers

Answered by shine1734
0
tan 70 = tan ( 50+ 20 )
tan 70 = (tan 50+ tan 20 ) \( - tan 50 tan 20 )
tan 70 - tan 20 * tan 50 * tan 20 = tan 50 tan 20
tan 70 - tan 50 = tan 50 + tan 20
tan 70 = 2tan 50 + tan 20
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